ConexaoBancoFactory.java

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package socius.persistencia;

import javax.persistence.EntityManager;
import javax.persistence.Persistence;

/**
 *
 * @author Lucas Dillmann <lucas [at] dillmann.com.br>
 */
public class ConexaoBancoFactory {

    private static final ConexaoBancoFactory instance = new ConexaoBancoFactory();
    private EntityManager em;
    
    private ConexaoBancoFactory() {
    }
    
    public static ConexaoBancoFactory getInstance() {
        return instance;
    }
    
    public EntityManager getEntityManager() {
        if (em == null) {
            em = Persistence.createEntityManagerFactory("socius").createEntityManager();
        }

        return em;
    }
    
}